Hi all, We are implementing a hospital information system and a human resources/payroll processing system on two identical dedicated servers with two Xeon Quad Core processors and 32 GB RAM each, both servers being attached via FC to a SAN, and both applications running on PostgreSQL 8.3 / CentOS 51. We are wondering about the advisability to distribute the databases between the two server machines, both machines acting as active production systems for one application each, and as warm standby servers for the other, using WAL shipping to a second database cluster running on another port on each of the two server machines. What would be the performance cost of doing so, rather than running all databases on one database cluster on one machine, and using the second machine as a warm standby server for all databases of the two applications? What other considerations should we take into account? We have no prior experience with PostgeSQL administration, having run our previous systems on Windows Servers and MS SQL Server. Thanks to all for your input! Andreas Philipp Clínica Universitaria Teletón Chía, Colombia
